Read the passage below. It summarizes survey information.
The Global Youth Tobacco Survey asks youth to fill in the answers to several questions about their tobacco use. In
this survey conducted between 2000 and 2007, it was found that in youth ages 13-15, 12 percent of boys and 7
percent of girls reported smoking cigarettes. This information was shared and reported on the American Cancer
Society website. The information was then used by several industries in the fields of health care, insurance, and
education.
What is a reason that these data may be unreliable?

It is from a self-reporting survey, and teens may not want to answer the questions honestly.

Explanation:

Just got it right.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

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